Class-D integrally-formed double inductors applied to automobile audio

Abstract

A framework component comprises a first framework and a second framework which are arranged in parallel, coils are arranged in the first framework and the second framework, the number of the end fixing pieces is two, the two end fixing pieces are fixed to the two opposite ends of the first framework and the second framework in a mold pressing mode respectively, and the two end fixing pieces are fixed to the two ends of the first framework and the two ends of the second framework in a mold pressing mode respectively. The end part fixing sheets are provided with pin structures connected with the coil, one side of each end part fixing sheet is provided with a side mounting seat, each side mounting seat comprises a seat body and a mounting pin arranged at the bottom of the seat body, and the seat bodies are connected with the end part fixing sheets. According to the Class-D integrally-formed double inductor applied to the automobile audio, the first framework, the second framework, the end fixing piece and the side mounting base are made into the integrally-formed double inductor in a mold pressing annealing mode and the like, and therefore the reliability and the stability of the inductor are improved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a Class-D integrally molded dual inductor for use in car audio systems. Background Technology

[0002] The Class-D molded dual inductor is an inductor specifically designed for Class-D applications, featuring low distortion, high audio quality, and a compact package design. This inductor is typically used in Class-D output filters to achieve optimal audio performance and electromagnetic compatibility (EMC).

[0003] Molded inductors offer numerous advantages, including small size, light weight, strong anti-interference capabilities, and excellent high-frequency performance. These characteristics make them ideal for use in modern electronic products, especially in space-constrained circuits with high performance requirements. Molded inductors are formed by die-casting a coil embedded within magnetic metal powder, creating a fully enclosed structure that provides excellent magnetic shielding and effectively reduces electromagnetic interference (EMI), which is particularly important for Class-D amplifiers.

[0004] In recent years, with the continuous development of technology, the performance requirements for hardware devices have become increasingly stringent, especially the requirements for local power. However, the input voltage of ICs is typically designed to be lower and lower, making increasing the current the only option in circuit design to meet power demands. On the other hand, taking electronic devices such as automotive audio systems as an example, considering the specific application scenarios, the design and conception of power inductors have relatively strict requirements regarding their external dimensions and internal structure. Not only must the internal space of the device be fully utilized, but the interference caused by the power inductor to the normal operation of other components must also be minimized, given the tight arrangement of various electronic components within the device. Considering the compact space requirements of integrated electronic components and the performance requirements of inductors such as conversion efficiency, energy consumption, and electromagnetic radiation, a comprehensive optimization design of the structure of coupled dual-inductor devices is needed based on existing technology to improve yield and productivity while making them suitable for various application scenarios such as automotive audio systems. Utility Model Content

[0005] The purpose of this invention is to provide a Class-D integrated dual inductor for use in car audio systems, in order to address the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A Class-D molded dual inductor for use in car audio systems, comprising:

[0008] A skeleton component, comprising a first skeleton and a second skeleton arranged side by side, wherein coils are disposed within both the first skeleton and the second skeleton.

[0009] The end fixing pieces are two in number and are respectively molded and fixed at opposite ends of the first frame and the second frame. The end fixing pieces are provided with pin structures that are connected to the coil.

[0010] A side mounting base is provided on one side of each of the end fixing pieces. The side mounting base includes a base body and a mounting foot provided at the bottom of the base body. The base body is connected to the end fixing piece.

[0011] The aforementioned Class-D integrated dual inductor for car audio systems has multiple heat-conducting plates on its base, which are arranged at intervals along the width of the base.

[0012] The aforementioned Class-D integrated dual inductor used in car audio systems has a heat-conducting part and a heat-dissipating part on the end fixing plate, and the heat-conducting part is connected to the heat-conducting plate accordingly.

[0013] The aforementioned Class-D integrated dual inductor used in car audio systems has a strip-shaped heat dissipation cavity formed between the heat-conducting sheets.

[0014] The aforementioned Class-D integrated dual inductor used in car audio systems includes a heat dissipation section comprising heat dissipation holes disposed on the end fixing plate, the heat dissipation holes being correspondingly connected to the strip-shaped heat dissipation cavity.

[0015] The aforementioned Class-D integrated dual inductor for car audio systems also includes a heat sink on its housing. Each of the strip-shaped heat dissipation cavities contains a heat sink, and the heat sink is connected to the heat-conducting plates on both sides of the strip-shaped heat dissipation cavity.

[0016] In the aforementioned Class-D integrated dual inductor used in car audio systems, the length of the heat sink is less than the length of the strip-shaped heat dissipation cavity, and a heat dissipation gap is formed between the strip-shaped heat dissipation cavity and the end fixing plate.

[0017] In the above technical solution, the Class-D integrated dual inductor for car audio provided by this utility model includes a frame component, end fixing pieces, and side mounting bases. The frame component includes a first frame and a second frame arranged in parallel. Coils are provided in both the first frame and the second frame. The two end fixing pieces are respectively molded and fixed to the opposite ends of the first frame and the second frame. A side mounting base is provided on one side of each end fixing piece. The first frame, the second frame, the end fixing pieces, and the side mounting bases are integrated into a dual inductor by molding or other methods, thereby improving the reliability and stability of the inductor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 One of the perspective views of a Class-D integrated dual inductor for use in car audio, provided as an embodiment of this utility model;

[0020] Figure 2 A second perspective view of a Class-D integrated dual inductor for use in car audio systems, provided as an embodiment of this utility model;

[0021] Figure 3 A top view of a Class-D integrally molded dual inductor for use in car audio, provided as an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the end fixing piece provided in an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Skeleton component; 11. First skeleton; 12. Second skeleton; 2. End fixing piece; 21. Pin structure; 22. Heat dissipation part; 23. Heat conduction part; 3. Side mounting base; 31. Base body; 32. Mounting foot; 33. Heat conduction plate; 34. Heat sink; 35. Heat dissipation gap. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, this utility model provides a Class-D integrated molded dual inductor for car audio, including a frame component 1, end fixing pieces 2, and side mounting bases 3. The frame component 1 includes a first frame 11 and a second frame 12 arranged in parallel. Both the first frame 11 and the second frame 12 are provided with magnetic cores and coils. There are two end fixing pieces 2, which are respectively molded and fixed to the opposite ends of the first frame 11 and the second frame 12. The end fixing pieces 2 are provided with pin structures 21 that are connected to the coils. Each end fixing piece 2 has a side mounting base 3 on one side. The side mounting base 3 includes a base body 31 and mounting feet 32 ​​provided at the bottom of the base body 31. The base body 31 is connected to the end fixing pieces 2.

[0027] Specifically, the first frame 11 and the second frame 12 have the same structure and size, both being cuboid structures. The interiors of the first frame 11 and the second frame 12 are hollow, forming mounting cavities. A magnetic core and a coil are disposed inside the mounting cavities. Alternatively, a coil and soft magnetic powder can be disposed inside the mounting cavities, with the coil embedded in the soft magnetic powder. The magnetic core, coil, and soft magnetic powder are existing technologies and will not be described in detail. At least the opposite sidewalls of the first frame 11 and the second frame 12 are made of shielding insulating material; alternatively, all sidewalls of the first frame 11 and the second frame 12 may be made of insulating material.

[0028] In this embodiment, the area of ​​the end fixing piece 2 is larger than the area of ​​the end of the first frame 11 by two parts. Thus, after the first frame 11 and the second frame 12 are installed side by side, the end fixing piece 2 can seal the ends of the first frame 11 and the second frame 12. An end fixing piece 2 is provided at both ends of the first frame 11 and the second frame 12. The end fixing piece 2 is fixed together with the first frame 11 and the second frame 12 by molding. At the same time, two pin structures 21 are provided on each end fixing piece 2. The pin structures 21 can adopt the structure of the prior art. The two end fixing pieces 2 form a total of four pin structures 21. The coil in the first frame 11 is connected to the two pin structures 21 on the left side of the two end fixing pieces 2, and the coil in the second frame 12 is connected to the two pin structures 21 on the right side of the two end fixing pieces 2. There are two side mounting seats 3. The two side mounting seats 3 are respectively located on the side of the end fixing piece 2 away from the skeleton member 1. The side mounting seats 3 are molded and fixed together with the end fixing piece 2. The side mounting seat 3 includes a seat body 31. The bottom of the seat body 31 is provided with mounting feet 32. The mounting feet 32 ​​are used for mounting the side mounting seat 3.

[0029] The present invention provides a Class-D integrated dual inductor for automotive audio systems, comprising a frame component 1, end fixing pieces 2, and a side mounting base 3. The frame component 1 includes a first frame 11 and a second frame 12 arranged in parallel, each containing a coil. The two end fixing pieces 2 are respectively molded and fixed to opposite ends of the first frame 11 and the second frame 12. Each end fixing piece 2 has a side mounting base 3 on one side. The first frame 11, the second frame 12, the end fixing pieces 2, and the side mounting base 3 are integrated into a dual inductor through molding or other methods, thereby improving the reliability and stability of the inductor.

[0030] In this embodiment, preferably, a plurality of heat-conducting plates 33 are provided on the base 31. The plurality of heat-conducting plates 33 are arranged sequentially at intervals along the width direction of the base 31. The heat-conducting plates 33 are arranged in parallel with each other and there is a certain distance between them, so that a strip-shaped heat dissipation cavity is formed between the heat-conducting plates 33.

[0031] In this embodiment, preferably, the end fixing plate 2 is provided with a heat-conducting part 23 and a heat dissipation part 22. The heat-conducting part 23 is connected to the heat-conducting plate 33. The heat-conducting part 23 is a heat-conducting strip provided on the end fixing plate 2. The heat-conducting strip and the end fixing plate 2 are an integral structure. The number of heat-conducting strips is consistent with the number of heat-conducting plates 33. The heat-conducting strips and heat-conducting plates 33 are arranged in a one-to-one correspondence. Each heat-conducting plate 33 is connected to each heat-conducting strip. In this way, the heat in the first frame 11 and the second frame 12 can be transferred to the heat-conducting plate 33 through the heat-conducting strips, thereby improving the heat dissipation effect through the heat-conducting plate 33.

[0032] In this embodiment, preferably, the heat dissipation part 22 includes heat dissipation holes provided on the end fixing piece 2. Each heat dissipation part 22 may include one, two, three or more heat dissipation holes, and the heat dissipation holes are correspondingly connected to the strip heat dissipation cavity; in this way, the heat in the first frame 11 and the second frame 12 can be dissipated through the heat dissipation holes and the heat dissipation strip heat dissipation cavity.

[0033] In this embodiment, preferably, the base 31 is also provided with a heat sink 34, and each strip heat dissipation cavity is provided with a heat sink 34. The heat sink 34 is connected to the heat conduction plates 33 on both sides of the strip heat dissipation cavity. Thus, the heat conduction plates 33, the heat sink 34, and the heat conduction plates 33 are connected in sequence to form a heat conduction and heat dissipation structure, which can quickly dissipate heat from the first frame 11 and the second frame 12. The length of the heat sink 34 is less than the length of the strip heat dissipation cavity. A heat dissipation gap 35 is formed between the strip heat dissipation cavity and the end fixing plate 2. The heat dissipation gap 35 is connected to the heat dissipation hole, thereby enabling heat dissipation treatment for the first frame 11 and the second frame 12.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A Class-D molded dual inductor for use in car audio systems, characterized in that, include: A skeleton component, comprising a first skeleton and a second skeleton arranged side by side, wherein coils are disposed within both the first skeleton and the second skeleton. The end fixing pieces are two in number and are respectively molded and fixed at opposite ends of the first frame and the second frame. The end fixing pieces are provided with pin structures that are connected to the coil. A side mounting base is provided on one side of each of the end fixing pieces. The side mounting base includes a base body and a mounting foot provided at the bottom of the base body. The base body is connected to the end fixing piece.

2. The Class-D molded dual inductor for automotive audio systems according to claim 1, characterized in that, The base is provided with a plurality of heat-conducting plates, which are arranged at intervals along the width direction of the base.

3. The Class-D molded dual inductor for automotive audio systems according to claim 2, characterized in that, The end fixing plate is provided with a heat-conducting part and a heat-dissipating part, and the heat-conducting part is connected to the heat-conducting plate accordingly.

4. The Class-D molded dual inductor for automotive audio systems according to claim 3, characterized in that, A strip-shaped heat dissipation cavity is formed between the heat-conducting sheets.

5. The Class-D molded dual inductor for automotive audio systems according to claim 4, characterized in that, The heat dissipation part includes heat dissipation holes provided on the end fixing plate, and the heat dissipation holes are correspondingly connected to the strip-shaped heat dissipation cavity.

6. The Class-D molded dual inductor for automotive audio systems according to claim 5, characterized in that, The base is also provided with heat sinks, and each of the strip-shaped heat dissipation cavities is provided with a heat sink, and the heat sinks are connected to the heat-conducting plates on both sides of the strip-shaped heat dissipation cavity.

7. The Class-D molded dual inductor for automotive audio systems according to claim 6, characterized in that, The length of the heat sink is less than the length of the strip-shaped heat dissipation cavity, and a heat dissipation gap is formed between the strip-shaped heat dissipation cavity and the end fixing plate.

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